Description
Blinko through 1.8.8 contains a broken access control vulnerability in the /api/file route that allows authenticated users to read other users' private attachments due to a flawed owner check. Attackers can supply another user's stored filename, following a basename plus millisecond-timestamp pattern, to download private, non-shared attachments.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| blinkospace | blinko | ≤ 1.8.8 | — |
References
- https://hackmd.io/@hieuPenguinnn/blinko-attachment-accountid-idor technical-description exploit
- https://github.com/blinkospace/blinko/blob/178e4b3538a21823a50ac2481e653d56cb1ffa86/server/routerExpress/file/file.ts#L148 technical-description
- https://github.com/blinkospace/blinko product
- VulnCheck Advisory: Blinko through 1.8.8 Private Attachment Read via /api/file Route third-party-advisory